Electronvolts (eV) to Tonnes of TNT (t-tnt) conversion

1 eV = 3.829294e-29 t-tntt-tnt → eV
Formula
1 eV = 3.829294e-29 t-tnt

Understanding Electronvolts to Tonnes of TNT Conversion

The electronvolt (eV) is the fundamental energy unit of particle and nuclear physics, defined by an electron crossing a one-volt potential. A tonne of TNT is a conventional energy unit equal to 4.184×1094.184 \times 10⁹ joules, used to describe explosive yields and, historically, nuclear detonations. Converting eV to tonnes of TNT connects the energy of individual nuclear events to the explosive-yield scale familiar from weapons and blast physics.

Conversion Formula

1 eV=3.829294×10−29 t-tnt1\ \text{eV} = 3.829294 \times 10⁻²⁹\ \text{t-tnt}

To convert Electronvolts to Tonnes of TNT, multiply by this factor:

t-tnt=eV×3.829294×10−29\text{t-tnt} = \text{eV} \times 3.829294 \times 10⁻²⁹

Step-by-Step Example

Convert 25 Electronvolts to Tonnes of TNT.

t-tnt=25×3.829294×10−29=9.573235×10−28 t-tnt\text{t-tnt} = 25 \times 3.829294 \times 10⁻²⁹ = 9.573235 \times 10⁻²⁸\ \text{t-tnt}

How to Convert Electronvolts to Tonnes of TNT

Relate a nuclear-event energy to the explosive-yield scale in one step.

  1. Start with electronvolts: Take the energy value, such as 25 eV.
  2. Multiply by the factor: Use 3.829294×10−293.829294 \times 10⁻²⁹ tonnes of TNT per eV.
  3. Perform the multiplication: 25×3.829294×10−2925 \times 3.829294 \times 10⁻²⁹.
  4. State the answer: 25 eV equals 9.573235×10−289.573235 \times 10⁻²⁸ t-tnt.

Electronvolts to Tonnes of TNT conversion table

Electronvolts (eV)Tonnes of TNT (t-tnt)
00
13.829294e-29
27.658588e-29
31.148788e-28
41.531718e-28
51.914647e-28
62.297576e-28
72.680506e-28
83.063435e-28
93.446365e-28
103.829294e-28
155.743941e-28
207.658588e-28
259.573235e-28
301.148788e-27
401.531718e-27
501.914647e-27
602.297576e-27
702.680506e-27
803.063435e-27
903.446365e-27
1003.829294e-27
1505.743941e-27
2007.658588e-27
2509.573235e-27
3001.148788e-26
4001.531718e-26
5001.914647e-26
6002.297576e-26
7002.680506e-26
8003.063435e-26
9003.446365e-26
10003.829294e-26
20007.658588e-26
30001.148788e-25
40001.531718e-25
50001.914647e-25
100003.829294e-25
250009.573235e-25
500001.914647e-24
1000003.829294e-24
2500009.573235e-24
5000001.914647e-23
10000003.829294e-23

What is the Electronvolt?

The electronvolt is a small unit of energy used throughout atomic, nuclear, and particle physics to describe the energies of individual particles, photons, and chemical or nuclear reactions.

Definition

One electronvolt is the kinetic energy gained by a single electron accelerated through an electric potential difference of one volt:

1 eV=1.60218×10−19 J1\ \text{eV} = 1.60218 \times 10⁻¹⁹\ \text{J}

Since the 2019 redefinition of SI units, this value is exact: 1 eV = 1.602176634 × 10⁻¹⁹ J, because the elementary charge is now a defined constant. Common multiples include the keV (10³ eV), MeV (10⁶ eV), GeV (10⁹ eV), and TeV (10¹² eV).

Origin and History

The unit arose in the early 20th century as physicists studied electrons and ions accelerated in vacuum tubes and early particle accelerators, where energy expressed in volts of accelerating potential was far more natural than joules. It became the standard energy scale as quantum and nuclear physics matured.

Law and Notable Facts

The electronvolt is accepted for use with the SI system though it is not itself an SI unit. Via mass-energy equivalence, particle masses are routinely quoted in eV/c²: the electron's rest mass is about 511 keV/c², and the proton's is about 938 MeV/c².

Real-World Examples and Conversions

  • Visible-light photons carry roughly 1.6 to 3.3 eV each.
  • Chemical bond energies are typically a few eV per bond.
  • The Large Hadron Collider accelerates protons to about 6.5 TeV, or 6.5 × 10¹² eV, roughly 1.04 microjoules per proton.

What is the Tonne of TNT?

The tonne of TNT is a unit of energy used to express the yield of explosions, especially large blasts and nuclear weapons, by comparison with the energy released by detonating trinitrotoluene (TNT).

Definition

One tonne of TNT is defined by convention as the energy released by one metric tonne of TNT, based on a fixed value of 4,184 joules per gram:

1 t-tnt=4.18400×109 J1\ \text{t-tnt} = 4.18400 \times 10⁹\ \text{J}

The figure is a convention, not a measured property of TNT (whose actual detonation energy varies from about 2,700 to 4,600 J/g). The value 1 gram TNT = 4,184 J corresponds exactly to one thermochemical kilocalorie per gram.

Origin and History

The unit emerged in the mid-20th century with the development of nuclear weapons, when engineers needed a familiar chemical-explosive benchmark to convey enormous energy releases. The kiloton (10⁹ cal) and megaton (10¹² cal) became the standard scales for reporting nuclear yields.

Law and Notable Facts

The convention 1 kt TNT = 10¹² calories = 4.184 × 10¹² J is standardized in defense and geophysics. Seismologists also use TNT equivalents to communicate the energy of earthquakes and impacts to the public.

Real-World Examples and Conversions

  • 1 tonne of TNT equals about 4.184 gigajoules, or roughly 1,162 kilowatt-hours.
  • The Hiroshima bomb released about 15 kilotons, roughly 6.3 × 10¹³ J.
  • The 2020 Beirut port explosion is estimated at around 500 to 1,100 tonnes of TNT equivalent.

Frequently Asked Questions

How many tonnes of TNT are in one electronvolt?

One electronvolt equals 3.829294×10−293.829294 \times 10⁻²⁹ tonnes of TNT, an infinitesimal fraction of any explosion.

How do I convert electronvolts to tonnes of TNT?

Multiply the eV value by 3.829294×10−293.829294 \times 10⁻²⁹. For example, 25 eV equals 9.573235×10−289.573235 \times 10⁻²⁸ t-tnt.

How many electronvolts equal one tonne of TNT?

About 2.611447×10282.611447 \times 10²⁸ electronvolts are needed to match one tonne of TNT.

Why express nuclear energies in tonnes of TNT?

Fission and fusion release millions of eV per event, and converting to tonnes of TNT lets analysts compare accumulated event energy against the blast-yield scale used in physics and defense contexts.

What is one tonne of TNT in joules?

By convention a tonne of TNT is exactly 4.184×1094.184 \times 10⁹ joules, the basis for this factor.

People also convert

eV to WseV to WmeV to WheV to mWheV to kWheV to MWheV to GWheV to J

Complete Electronvolts conversion table

eV
UnitResult
Watt-seconds (Ws)1.602177e-19 Ws
Watt-minutes (Wm)2.670294e-21 Wm
Watt-hours (Wh)4.450491e-23 Wh
Milliwatt-hours (mWh)4.450491e-20 mWh
Kilowatt-hours (kWh)4.450491e-26 kWh
Megawatt-hours (MWh)4.450491e-29 MWh
Gigawatt-hours (GWh)4.450491e-32 GWh
Joules (J)1.602177e-19 J
Kilojoules (kJ)1.602177e-22 kJ
Megajoules (MJ)1.602177e-25 MJ
Gigajoules (GJ)1.602177e-28 GJ
British Thermal Units (IT) (BTU)1.51857e-22 BTU
US Therms (thm)1.518933e-27 thm
Ergs (erg)1.602177e-12 erg
Foot-pounds (ft-lbf)1.181705e-19 ft-lbf
Tonnes of TNT (t-tnt)3.829294e-29 t-tnt
calories (cal)3.829294e-20 cal
Kilocalories (kcal)3.829294e-23 kcal

Energy conversions